diff --git a/src/psychonauts/render.ts b/src/psychonauts/render.ts
index dd4a1af1e..9697f619f 100644
--- a/src/psychonauts/render.ts
+++ b/src/psychonauts/render.ts
@@ -20,6 +20,7 @@ import { GfxrAttachmentSlot } from '../gfx/render/GfxRenderGraph.js';
 import { AABB } from '../Geometry.js';
 import { setAttachmentStateSimple } from '../gfx/helpers/GfxMegaStateDescriptorHelpers.js';
 import { GfxRenderCache } from "../gfx/render/GfxRenderCache.js";
+import { GfxShaderLibrary } from "../gfx/helpers/GfxShaderLibrary.js";
 
 function decodeTextureData(format: TextureFormat, width: number, height: number, pixels: Uint8Array<ArrayBuffer>): DecodedSurfaceSW {
     switch (format) {
@@ -93,6 +94,8 @@ class PsychonautsProgram extends DeviceProgram {
     public override both = `
 precision mediump float;
 
+${GfxShaderLibrary.MatrixLibrary}
+
 // Expected to be constant across the entire scene.
 layout(std140) uniform ub_SceneParams {
     Mat4x4 u_Projection;